Former champion Anthony Dirrell and 168-pound contender Avni Yildirim continued to exchange words at a heated weigh-in on Friday before they battle this Saturday for the vacant WBC Super Middleweight World Championship in the main event of Premier Boxing Champions on FS1 and FOX Deportes from the Armory in Minneapolis.

The weigh-in also featured Minneapolis-native Jamal James and Janer Gonzalez, who battle in a welterweight attraction as part of televised coverage beginning at 10 p.m. ET/7 p.m. PT.

Tickets for the event, which is promoted by Warriors Boxing and TGB Promotions, are on sale now, and can be purchased at the Armory at http://ArmoryMN.com/ and through Ticketmaster.

On May 25, 1964, Muhammad Ali knocked out Sonny Liston in the first round of their rematch in Lewiston, Maine. Ali landed a single right-hand counter, called the anchor punch, to knock Liston out. Rumors abounded regarding the ending as many believed Liston could have gotten up. With the win, Ali retained his world heavyweight title.